What happens to the flow which passes through a curved shock wave?

Creates vorticity upstream

Flow passes by undisturbed

Creates vorticity downstream

Flow moves parallel to the curves shock wave

Correct Answer : Creates vorticity downstream

Explanation : When the fluid flows through a curved shock wave, it undergoes a strong entropy change due to the presence of shock wave. This causes the flow to rotate leading to the formation of vorticity in the downstream region of the shock wave.

Recently Updated in Aerodynamics Questions

If the Laplace equation is satisfied by the velocity potential, then the fluid flows.

True

False

Can Not Say

None of the above

Correct Answer : Option (A) : True

Explanation : For the fluid to flow, it is essential for the velocity potential ? to satisfy the Laplace equation. If the condition is not met, the fluid does not flow and has zero velocity.

Thus, the condition for the fluid to flow is :

What is the nature of the flow having a velocity potential?

Viscous

Inviscid

Rotational

Irrotational

Correct Answer : Option (D) : Irrotational

Explanation : For irrotational flow, curl of velocity vector yields zero. In case the curl of any vector is zero i.e.∇ × V = 0, where V is a vector, it is also expressed in the form of ∇ζ where ζ is a scalar function. In case of irrotational flow, velocity potential ? is the scalar function. Hence if the flow has a velocity potential, it automatically implies that it is irrotational.